Based on the technical characteristics of friction stirring welding

with the help of multi-field coupling reasonable solution techniques

Comsol Multiphysics software was used to establish thermal mechanical coupling finite element model of friction stirring welding A356.0-T61 aluminum alloy.JMatPro was applied for defining thermo-physical properties of A356 aluminum alloy material with temperature changes

and effects of axial down-pressure

rotation speed

welding speed and other factors on the temperature field and stress distribution evolution of friction stirring welding A356 aluminum alloy were analyzed mainly.The results show that the welding speed has domonant in influence on ellipticity of elliptic distribution of FSW isotherm shape.The largest welding equivalent stress is located at outside edge of SAZ

near which the small areas of low stress distribution shows discrete state.The effect significance order of process parameters on friction stirring welded A356 aluminum alloy temperature field distribution is presented as follows:welding speed > head rotation speed > axial downward pressure

and the effect significance order of process parameters on friction stirring welded A356 aluminum alloy stress distribution is presented as follows:axial downward pressure> welding speed>rotation speed.